Your opponent has 20 life before you tap Tree of Perdition. Assuming you tap this creature round 2 against a player and now the player's life total is 13, during your next turn, during your untap phase, you untap Tree of Perdition, does the player go back to 20?

If not what rule in Magic says that untapping makes the tapped ability null or reverse/ in contrast what rule in MTG says the tapped ability stays after the ability is used and not reversed?

Thank you,
Jay
]]>Format Discussionjaykaye05http://www.mtgthesource.com/forums/showthread.php?32776-Untapping-Cratures-w-AbilitiesCommander tournament / alternate casting costhttp://www.mtgthesource.com/forums/showthread.php?32753-Commander-tournament-alternate-casting-cost&goto=newpost
Tue, 23 Oct 2018 02:25:28 GMTPlayers in a commander tournament are trying to claim that when using dash, an "alternate" casting cost is not the same as a normal casting cost, therefore the "commander tax" that would apply to the normal casting cost does not apply to the alternate casting cost. Which is the true case? Is it safe to say this applies to other non-dash abilities?
]]>Format Discussiondeanhttp://www.mtgthesource.com/forums/showthread.php?32753-Commander-tournament-alternate-casting-cost